New search for 43 missing students

Mexican police sent horse-mounted patrols and officers with trained dogs up into the hills around the city of Iguala in an expanded search for 43 college students missing since last month.

The stepped-up hunt was ordered after investigators determined that 28 sets of human remains recovered from a mass grave discovered outside Iguala last weekend were not those of any of the youths who have not been seen since being confronted by police on September 26.